chromeos: Remove the last IME methods from ash::SystemTrayDelegate

ash/system/ime/tray_ime_chromeos_unittest.cc

Index: ash/system/ime/tray_ime_chromeos_unittest.cc
diff --git a/ash/system/ime/tray_ime_chromeos_unittest.cc b/ash/system/ime/tray_ime_chromeos_unittest.cc
index a7b2fe471e21f5f5567621acb713216b0cac6ed1..a4c0ef54f26807a65c53825bf4565ddf95d6361e 100644
--- a/ash/system/ime/tray_ime_chromeos_unittest.cc
+++ b/ash/system/ime/tray_ime_chromeos_unittest.cc
@@ -8,6 +8,7 @@
 #include "ash/accessibility_types.h"
 #include "ash/public/cpp/config.h"
 #include "ash/shell.h"
+#include "ash/system/ime/ime_util.h"
 #include "ash/system/ime_menu/ime_list_view.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "ash/test/ash_test_base.h"
@@ -19,7 +20,9 @@ namespace ash {
 
 class TrayIMETest : public test::AshTestBase {
  public:
-  TrayIMETest() {}
+  TrayIMETest()
+      : scoped_current_ime_(&current_ime_),
+        scoped_available_ime_list_(&available_ime_list_) {}
   ~TrayIMETest() override {}
 
   views::View* default_view() const { return default_view_.get(); }
@@ -48,6 +51,12 @@ class TrayIMETest : public test::AshTestBase {
   void TearDown() override;
 
  private:
+  IMEInfo current_ime_;
+  ime_util::ScopedCurrentImeForTesting scoped_current_ime_;
+
+  std::vector<IMEInfo> available_ime_list_;
+  ime_util::ScopedAvailableImeListForTesting scoped_available_ime_list_;
+
   std::unique_ptr<TrayIME> tray_;
   std::unique_ptr<views::View> default_view_;
   std::unique_ptr<views::View> detailed_view_;